Seeing her younger brother bring her girlfriend home, her cousin Touka Rinne began to feel uncomfortable when she didn't even have a lover at this age while her cousin had just turned 20. In particular, her nervousness, ambition, and extremely dark thoughts began to rise after accidentally seeing the sex scene of the two of them in the room. Without hesitation, that night she decided to lure her cousin to her room with the excuse of giving her a massage after tiring hours at the company. As expected, his cock innocently obeyed and was easily raped by her without mercy. After that time, he also felt that his cousin was much better than his lover, especially in terms of sex. Therefore, instead of inviting his lover to rain clouds, he and his cousin constantly have clumsy scenes behind her back, which is very sophisticated and miserable.